High Quality Content by WIKIPEDIA articles! An Executable Architecture (EA), in general, is the description of a system architecture (including software and/or otherwise) in a formal notation together with the tools (e.g. compilers/translators) that allow the automatic or semi-automatic generation of artifacts (e.g. capability gap analysis (CGA), models, software stubs, Military Scenario Definition Language (MSDL)) from that notation and which are used in the analysis, refinement, and/or the implementation of the architecture described.